Framework agreement for the maintenance of ultrapure water systems according to the manufacturer's specifications as well as the cyclical change of ion exchangers in ultrapure water systems.

> Maintenance of 20 ultrapure water systems, small/compact system design

> Maintenance of 8 ultrapure water systems, medium/large system design

> Replacement of approx. 75 ion exchangers, container sizes 550 to 6000, mixed-bed resin regenerated

> Replacement of approx. 12 ion exchangers, container sizes 1500 to 7000, mixed bed resin new

> Replacement of approx. 4 ion exchangers, container sizes 2000 to 6000, mixed-bed resin new for cooling circuits

> Replacement of approx. 15 ion exchangers, container sizes 550 to 6000, new mixed-bed resin, ultrapure resin